According to our theory of solar system formation, where did the comets of the Oort cloud form?

A) in the inner solar system
B) far beyond the orbit of Pluto
C) in the region of the jovian planets
D) in the asteroid belt


C

Physics & Space Science

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Observations of galaxies and clusters of galaxies indicate that about ____ percent of the matteruniverse is dark matter

a. 5 b. 25 c. 35 d. 45 e. 95

Physics & Space Science

Reflection of sound can occur in

A) air. B) water. C) both of these D) neither of these

Physics & Space Science

Semiconductors are ‘doped’ because

A. Doping makes them better insulators B. Doping helps to eliminate errors C. Doping decreases the costs D. Doping makes them better conductors

Physics & Space Science

In a certain region of space, the electric field is zero. From this fact, what can you conclude about the electric potential in this region?

1.It is zero. 2.It is constant. 3.It is positive. 4.It is negative. 5.None of these answers is necessarily true.

Physics & Space Science